[quote=shortyfox]You'll want to get your weight well forward to get the leeward bow deep so you can point better. Combine that with sitting amidships to induce heel. If you're by yourself, you'll probably wind up sitting by the mast.
I'm assuming the 4.5 is boomless and boomless mains have their own set of problems when it comes to good sail shape. Presumably there's a clew plate with a series of holes for attaching the mainsheet. The rear holes will give decidedly more camber for light air. Unfortunately, the shape of the upper half of the main will not be optimal. Conventional thinking is that the angle of the mainsheet should be pointed at the center of effort on the main. This is okay most of the time, but you may find in light air doing this will cause the bottom of the sail to be too flat. I have seen some people use a camber control line which is nothing more than a piece of 3/16ths tied off at the tack and the clew. Somewhere along its length have a 2 to 1 fiddle block with a built-in jam cleat. The idea is you can have your mainsheet at the optimum place on the clew plate and still be able to have a perfect curve on the bottom panel of the main.
Mast rotation works differently with boomless. Won't be much of an issue in light air, but in windier conditions a mast rotation device that induces rotation might be helpful to allow the mast to bend more. I would find this to be a pain however because you have to re-set it with every tack.[/quote]
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